diff --git a/package.json b/package.json
index 577092e..9560eb9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.45",
+  "version": "0.20.43-rc1",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/config/chains.json b/src/config/chains.json
index 4fad92a..ea887a8 100644
--- a/src/config/chains.json
+++ b/src/config/chains.json
@@ -38,6 +38,18 @@
       "curveRegistry": "0x93461072c00b2740c474a3d52c70be6249c802d8"
     }
   },
+  "204": {
+    "chainId": "204",
+    "explorer": "http://opbnbscan.com/",
+    "label": "opBNB Chain",
+    "shortName": "opBNB",
+    "code": "opbnb",
+    "rpc": "https://opbnb-mainnet-rpc.bnbchain.org",
+    "baseCurrencyName": "BNB",
+    "contracts": {
+      "WETH": "0x4200000000000000000000000000000000000006"
+    }
+  },
   "3": {
     "chainId": "3",
     "explorer": "https://ropsten.etherscan.io/",
@@ -77,6 +89,19 @@
       "curveRegistry": ""
     }
   },
+  "42161": {
+    "chainId": "42161",
+    "explorer": "https://arbiscan.io/",
+    "label": "Arbitrum",
+    "shortName": "Arbitrum",
+    "code": "arb",
+    "rpc": "https://arb1.arbitrum.io/rpc",
+    "baseCurrencyName": "ARB",
+    "contracts": {
+      "WETH": "0x82aF49447D8a07e3bd95BD0d56f35241523fBab1",
+      "curveRegistiry": "0x445FE580eF8d70FF569aB36e80c647af338db351"
+    }
+  },
   "4002": {
     "chainId": "4002",
     "explorer": "https://testnet.ftmscan.com/",
diff --git a/src/config/envs.json b/src/config/envs.json
index be254cf..8672516 100644
--- a/src/config/envs.json
+++ b/src/config/envs.json
@@ -93,6 +93,42 @@
             "http": "/orion-indexer/"
           }
         }
+      },
+      "42161": {
+        "api": "https://trade.orion.xyz/arbitrum-mainnet",
+        "services": {
+          "aggregator": {
+            "http": "/backend",
+            "ws": "/v1"
+          },
+          "blockchain": {
+            "http": ""
+          },
+          "priceFeed": {
+            "all": "/price-feed"
+          },
+          "indexer": {
+            "http": "/orion-indexer/"
+          }
+        }
+      },
+      "204": {
+        "api": "https://trade.orion.xyz/opbnb-mainnet",
+        "services": {
+          "aggregator": {
+            "http": "/backend",
+            "ws": "/v1"
+          },
+          "blockchain": {
+            "http": ""
+          },
+          "priceFeed": {
+            "all": "/price-feed"
+          },
+          "indexer": {
+            "http": "/orion-indexer/"
+          }
+        }
       }
     }
   },
diff --git a/src/constants/chains.ts b/src/constants/chains.ts
index 790a42d..74135ed 100644
--- a/src/constants/chains.ts
+++ b/src/constants/chains.ts
@@ -15,4 +15,6 @@ export const productionChains = [
   SupportedChainId.FANTOM_OPERA,
   SupportedChainId.POLYGON,
   SupportedChainId.OKC,
+  SupportedChainId.ARBITRUM,
+  SupportedChainId.OPBNB,
 ];
diff --git a/src/constants/networkCodes.ts b/src/constants/networkCodes.ts
index 75fe8ee..d04ac04 100644
--- a/src/constants/networkCodes.ts
+++ b/src/constants/networkCodes.ts
@@ -1 +1 @@
-export default ['ftm', 'bsc', 'eth', 'polygon', 'okc', 'arb', 'drip'] as const;
+export default ['ftm', 'bsc', 'eth', 'polygon', 'okc', 'arb', 'drip', 'opbnb'] as const;
diff --git a/src/types.ts b/src/types.ts
index 930c150..dcc0324 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -83,10 +83,11 @@ export enum SupportedChainId {
   MAINNET = '1',
   ROPSTEN = '3',
   GOERLI = '5',
-  ARBITRUM_GOERLI = '421613',
+  ARBITRUM = '42161',
   FANTOM_OPERA = '250',
   POLYGON = '137',
   OKC = '66',
+  OPBNB = '204',
 
   POLYGON_TESTNET = '80001',
   FANTOM_TESTNET = '4002',
@@ -94,6 +95,7 @@ export enum SupportedChainId {
   BSC_TESTNET = '97',
   OKC_TESTNET = '65',
   DRIP_TESTNET = '56303',
+  ARBITRUM_GOERLI = '421613',
 
   // For testing and debug purpose
   // BROKEN = '0',